navy has deployed two nuclear power aircraft carriers in the western pacific. they are navigating within reach. t several warships including vessels equipped with the air defense system are running alongside them. a navy sports person says the fleet provides a compact force of the united states and its allies and partners. there's fresh tension between japan and south korea. th south lnche aprotest with japan claiming that a helicopter belonging to the self-defense force entered the air defense identification zone in the sea of japan. the issue centers around the takeshima islands. they are claimed by japan but controlled by south korea. the south korean defense ministry says a helicopter took off located 54 kilometers east of the islands on september 21st. the ministry said the helicopter entered the zone for five minutes. it said the craft left after it was warned by air force fighter jets. the ministry noted prior approval is required before entering the zone. it set us defensive measure against unidentified aircraft. japanese government officials said the h